HTTP Request Smuggling
HTTP request smuggling is a cyber-attack method in which an attacker inserts a second request into an original request between a front-end and back-end server. In a successful HTTP request smuggling attack, the second request is “smuggled” in the initial request and then processed by the back-end server. Hackers frequently execute HTTP request smuggling attacks by altering the Content-Length and Transfer-Encoding HTTP headers. HTTP request smuggling attacks are often high impact as they frequently enable unauthorized data access, bypass security schemes, and directly compromise other application users.
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